The front of the garage has 2 car side by side parking (for compact cars), and the back of the garage is inaccessible for a car.

Cost per sq. ft is definitely higher than the rents would justify.Wind and flood insurance in the Keys are either inaccessible or extremely expensive.  

I've seen some houses where the crawlspace is virtually inaccessible. 

We are completely debt-free with about $75K liquid in cash and $60K in accessible savings accounts.

The garage once we finally struggled to get it open was inaccessible... literally the entrance was filled to the top with no path to walk inside lol

If I use BRRRR I will put an extra STEP in the PROCESS, but is it a complicated step compared to what I might gain in access to winning deals?

@David Petikyan I search through county held deeds as the auctions are highly competitive to the point of being inaccessible

Boric Acid (which is in powder form) works well, spread under appliances; under new base cabinets at install; in the wall voids whenever you open a wall for repair; under carpet pads and around the perimeter of rooms before base trim goes on; inside base cabinets toward the very back; and other fairly inaccessible and dark places you can find.

If you are not well versed in access or database queries, take some time and search around on google their are plenty of tutorials.

Then, as mentioned above in accessing the project risks and other factors like management, frequency of repairs or say collections the subject property is found to be 60% as desirable as the ideal investment, then 7% divided by 60% = 12% as an appropriate cap rate.An overall capitalization rate is another approach and mostly used for smaller commercial properties.